Steel slag processing technology

Abstract

The invention discloses a steel slag processing technology. The steel slag processing technology is mainly used for receiving and processing solid steel slag in all converter hot braising workshops and electric furnace hot braising workshops. The steel slag is subjected to coarse crushing through a crusher and smashing processing through a rod mill, then screening and magnetic separation processing are carried out, and the steel slag is classified into various products with different purposes such as slag steel, magnetic separation powder and tailings. The slag steel is fed into a steel plant to produce steel products with high added value, the magnetic separation powder is fed into a sintering plant to serve as sintering raw materials, and the steel slag tailings are fed into a slag steel powder production line to be deeply processed and used for equivalently replacing cement in various concrete and cement products (the mixing amount is 20%-30%). By means of the processing technology, the metallurgical solid waste can be efficiently and economically recycled in an environment-friendly mode.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment in the metallurgical industry, and in particular relates to a steel slag processing technology. Background technique [0002] Steel slag is the waste slag produced in the steelmaking process. It mainly comes from the oxides formed after the oxidation of silicon, manganese, phosphorus, iron and other elements contained in molten iron and scrap steel. Slagging agents, as well as oxidants, desulfurization products and eroded furnace lining materials, etc. It accounts for about 15%~20% of steel output. [0003] With the rapid development of our country's economy and society, steel production has grown rapidly. According to statistics, my country's steel slag is discharged at a rate of more than 85 million tons every year, but the utilization rate of steel slag is about 30%. Due to the low utilization rate of steel slag in my country, a large amount of steel slag is piled up and left i...

AI Technical Summary

Problems solved by technology

Due to the low utilization rate of steel slag in my country, a large amount of steel slag is piled up and left idle, which not only occupies a large amount of cultivated land, but also the alkali metal ions and heavy metal ions in it penetrate into the surface water under the washing of rainwater, pollute water resources, and threaten human health

Moreover, steel slag is pulverized into fine alkaline dust particles during the natural stacking process, which can easily enter the surrounding atmosphere under the action of natural wind, causing serious pollution to the surrounding environment.

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